![\"H3a6e9905ed9d497d98801b63421fe259I.png\"](\"https:\/\/ecdn6.globalso.com\/upload\/p\/5183\/image_other\/2026-05\/h3a6e9905ed9d497d98801b63421fe259i.png\")
<\/p>\nXi’an, Shaanxi Province, China-October 22, 2026<\/p>\n
During the operation of high\u2011speed EMUs, the release of electric braking energy, discharge of fault current and equipotential protection of the vehicle body are critical to the stable operation of the whole high\u2011voltage system. Braking resistor cabinets and high\u2011voltage grounding circuits are constantly subjected to pulsed heavy current, severe vibration, alternating temperature differences, as well as erosion from rain, snow, wind and sand. Direct connection via rigid copper bars easily generates mechanical stress due to thermal expansion, displacement and asynchronous vibration, which may result in base cracking, bolt loosening and rising contact resistance, bringing safety risks such as overheating, arcing and grounding failure. Focusing on high\u2011power flexible conductive solutions for rail transit, Xi’an Zipeng Technology’s self\u2011developed laminated copper foil flexible busbars have been stably supplied for braking resistor cabinets and high\u2011voltage grounding collection circuits of multiple EMU models.<\/p>\n
The roof\u2011mounted braking resistor cabinet serves as the energy consumption unit for dynamic electric braking of EMUs. When the train decelerates, massive kinetic energy is converted into electric energy and dissipated as heat through braking resistors to prevent overvoltage of the catenary network. Braking resistors witness a sharp temperature rise during operation, and obvious thermal elongation occurs in resistor modules and ceramic supporting bases. Meanwhile, the roof area is exposed to high\u2011speed airflow, sunlight and condensation, accompanied by continuous vibration caused by turning and bumping of the train. If rigid copper bars are adopted, thrust generated by thermal expansion will pull the ceramic resistor bases directly. Under repeated long\u2011term stress, the bases are prone to cracking, leading to falling\u2011off of resistor elements and circuit disconnection. The large\u2011cross\u2011section copper flexible busbars supplied by Xi’an Zipeng Technology are integrally formed by diffusion welding of multiple layers of T2 copper foil with compact and non\u2011delaminated end faces. They maintain stable temperature rise under short\u2011time pulsed heavy current conditions and release assembly stress through flexible deformation to compensate the thermal elongation of resistors and protect resistor bases from tensile damage. The products are tinned for corrosion resistance and covered with high\u2011temperature resistant, low\u2011smoke and halogen\u2011free insulating sleeves to adapt to the harsh open\u2011air roof environment, and meet the requirements of short\u2011time withstand impulse current. They are widely applied in CRH380 and CR400 series for connections between roof braking resistor modules and between resistor banks and high\u2011voltage busbars.<\/p>\n
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High\u2011voltage grounding circuits undertake three core functions: equipotential bonding of the whole vehicle, rapid discharge of short\u2011circuit fault current and suppression of shaft current. The application scope covers vehicle grounding collector bars, bogie frames, gearboxes, axle box grounding jumpers and protective grounding points inside high\u2011voltage cabinets. Relative dynamic displacements such as floating, lateral swinging and deflection exist between the EMU carbody and bogies during operation, and different equipment bases vibrate at inconsistent frequencies, which cannot be accommodated by rigid conductors. Once the grounding link is disconnected, potential difference will form on the carbody and induce shaft current, resulting in galvanic corrosion and premature failure of bearings. In case of high\u2011voltage grounding faults, poor grounding paths will hinder rapid fault current discharge and expand the scope of failure impact. The customized copper flexible busbars developed by Xi’an Zipeng Technology for high\u2011voltage grounding circuits balance current\u2011carrying capacity and flexible deformation capability. They enable multi\u2011directional displacement compensation to keep grounding circuits continuously conductive and stabilize contact resistance, so that fault current can be quickly guided to the ground, eliminating carbody potential difference and protecting bearings and high\u2011voltage electrical components. Compared with ordinary copper braids, laminated copper flexible busbars feature stronger current\u2011carrying capacity and lower parasitic inductance, showing prominent advantages at high\u2011power protective grounding points.<\/p>\n
Rail transit components require extremely high reliability. All rail\u2011transit\u2011grade copper flexible busbars from Xi’an Zipeng Technology are designed and manufactured in strict accordance with EN50155 for on\u2011board electronic equipment, EN45545 HL3 fire protection standard for rail vehicles and relevant TB\/T standards for rolling stock. They have passed a complete set of type tests including high\u2011low temperature cycling, vibration fatigue, salt spray, short\u2011time short\u2011circuit current withstand and dielectric withstand voltage. We flexibly adjust the cross\u2011section, length, bending structure and plating scheme according to different customer requirements. Tinned products with large cross sections are preferred for main circuits of braking resistors to balance current carrying and corrosion resistance; silver\u2011plated options are available for critical high\u2011voltage grounding points to further stabilize contact resistance.<\/p>\n
Xi’an Zipeng Technology provides one\u2011stop customized services for main engine manufacturers and converter supporting enterprises, ranging from drawing communication and sample trial production to bulk delivery. With in\u2011depth research on working conditions of EMU high\u2011voltage systems, we keep optimizing the structure and technology of copper flexible busbars. By delivering stable and reliable flexible conductive products, we consolidate the safety barrier for braking energy dissipation and high\u2011voltage grounding of EMUs, and support the high\u2011quality localization development of rail transit equipment.<\/p>\n
Need a sample for testing? welcome to mail: info@zpbusbar.com<\/p>\n
About US<\/p>\n
At Zipeng, we specialize in the engineering and manufacturing of custom Copper Foil Flexible Busbars, and Copper Laminated Flexible Busbars for high-current electrical applications. Our products are designed to deliver reliable conductivity, long service life, and stable performance in demanding industries including battery energy storage, power distribution, switchgear, transformers, renewable energy, and industrial automation.<\/p>\n
Media Contact<\/span> Xi’an, Shaanxi Province, China-October 22, 2026 During the operation of high\u2011speed EMUs, the release of electric braking energy, discharge of fault current and equipotential protection of the vehicle body are<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/posts\/619938"}],"collection":[{"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/comments?post=619938"}],"version-history":[{"count":0,"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/posts\/619938\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/media?parent=619938"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/categories?post=619938"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.olympiajournal.com\/news\/wp-json\/wp\/v2\/tags?post=619938"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Company Name:<\/strong> Xi’an Zipeng Machinery Technology Co., Ltd<\/a>
Contact Person:<\/strong> Media Relations
Email:<\/strong> Send Email<\/a>
Country:<\/strong> China
Website:<\/strong> https:\/\/www.zpbusbar.com\/<\/a><\/p>\n<\/p>\n","protected":false},"excerpt":{"rendered":"